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A method to finely separate saturated hydrocarbon and aromatic hydrocarbon by high performance liquid chromatography was introduced.

该文介绍了用高压液相色谱对族组分中的饱和烃、单环烃、二环烃及三环以上烃的精细分离方法。

The commercial production of aromatics is achieved by modern aromatics combination unit with complex processes accompanying transformation between aromatics.

烃的大规模工业化生产是通过现代化烃联合装置实现的,其加工流程复杂,伴有烃间的相互转化过程。

For copper-treated chloroform extracts the total yield always increases, whereas that of the methanol extracts does not. GC-MS analysis on the fractions from EOM is carried out. No effect on the saturated hydrocarbons is found. For aromatic hydrocarbons copper has no influence on some samples and strong influence on the other.

沥青族组分分析表明,铜的加入对饱和烃在定性和定量两方面基本没有影响;部分样品的烃也基本无变化,但另外一些样品的烃差别却很大,这些样品加铜后得到的烃要比不加铜的在数量上高出几倍。

Six derivatives of 4-phenyl-3-phenoloxymethyl-5-mercapto-1,2,4-triazlyole were synthesized from phenoloxyacetyl hydrazide by two-steps reaction under microwave irradiation, then reacted with 2-chloroacetic acid to give six novel derivatives of 2-(3-phenoxymethyl-4-phenyl-[1,2,4]triazole-5-thio)-acetic acid.

在微波辐射条件下,氧乙酰肼经两步反应制得4-苯基-3-氧甲基-1,2,4-三唑-5-硫酮衍生物,再与氯乙酸反应得到6种尚未见文献报道的2-(3-氧甲基-4-苯基-1,2,4-三唑-5-硫基)乙酸衍生物。

The efficacy of three formulations to B.germanica was evaluated with a small container and a quadr-cage olfactometer system. Results The linalool deploied with aethylenum-Vac granule and activated alumina granule had obvious repellency to B.germanica, and 97.7% repellency of the former was more effective than the latter.

结果 樟醇-乙烯醋酸乙烯酯颗粒剂与活性氧化铝颗粒剂对德国小蠊有明显的驱避性,其中樟醇-乙烯醋酸乙烯酯颗粒剂优于后者,驱避性高达97.7%,而樟醇。

F. pumila had the strongest capacity to adhere to walls, and it formed a quite good covering landscape by means of a large quantity of adventitious roots. Furthermore, it was tolerant to shade, and the effects of shading on its growth and landscape covering were very small. P. heterophylla had the rapidest growth and covering speed, and it adhered to walls by adhesive discs, but was defoliated in winter or after a long period of shading. The other three vines climbed walls using adventitious roots, and their adhering capacities were all relatively poor. However, E. fortunei still formed a relatively good covering due to its rapid growth and emerald leaf colour. After shading for four months, leaves of F, pumila, C. grandiflora, and P. serpens became thin, and accordingly their leaf weight per unit area significantly decreased. Shading also reduced chlorophyll contents of C. grandiflora and E. fortunei but enhanced those of F. pumila and P. serpens, It did not influence leaf thickness, leaf weight or chlorophyll content of P. heterophylla. Whether shaded or not, the relationship between Pn and PAR for each species could be expressed as y=alnx+b, and furthermore there was a significant (P.01) correlation between them. Pn and LCP values for all five lianas also significant (P.01) correlated. Shading reduced LCP values of P. heterophylla, C. grandiflora and E. fortunei but increased LSP of F. pumila.

结果表明,1薛荔对墙体附着力最强,它依靠大量的不定根吸固在墙体上,形成很好的覆盖效果,而且薜荔耐荫,遮光对其生长与覆盖的影响很小;爬墙虎的生长与覆盖速度最快,它主要依靠吸盘吸固墙壁,但在冬季或长时间遮光后出现明显落叶现象,影响其覆盖景观;其他3种都依靠不定根沿墙面攀援,附着力相对较差,但扶藤由于生长较快,叶色终年保持翠绿,也能形成相对较好的覆盖效果;2遮光4个月后,薛荔、凌霄和蔓九节的叶片变薄,相应地这3种植物单位面积的叶片重量都显著减轻;遮光还使凌霄和扶藤的叶绿素含量减少,使薛荔和蔓九节的增加,但对爬墙虎的叶片厚度、叶重和叶绿素含量都不产生明显影响;3无论遮光与否,5种植物的Pn与PAR之间的关系都可用y=alnx+b表示,并且都达极显著相关,Pn与光补偿点之间亦呈极显著相关;遮光还使爬墙虎、凌霄和扶藤的LCP下降,并使薛荔的光饱和点升高。

We also found for the first time that the reaction between ketone and alcohol to ketal was catalyzed by benzamide and their derivatives, and the related mechanism is proposed. Furthermore, under the same irradiation condition, the photo-reaction of succimide with alcohol as well as the photolysis of benzene sulfonamide was also found and studied.

并首次发现在紫外光激发下,苯甲酰胺对酮和醇生成缩酮的反应有一定的催化作用,进而对一系列酰胺类化合物作了对比实验,发现酰胺类化合物均能对缩酮的生成有催化作用,并对酰胺的作用机理进行了初步探讨。

Finally,the electrocyclic ring-closure of N-vinylic ketenemine and a subsequent tautomerization lead to the formation of isoquinolines or benzoisoquinolines.

3发展了一种基叠氮和酰氯的AAB型串联反应,当控制基叠氮和酰氯的比例为2∶1时,反应生成N,N\'-二基脒类化合物。

This PhD thesis mainly summarizes the original results on studies of aromatic amide-derived phosphines,including the precatalyst system consisting of Aphos and Pd_2 and the applications for promoting room temperature Suzuki cross-coupling of aryl chlorides and aryl/vinyl bromides,respectively,with aryl/vinyl boronic acids,and alkyl boranes.

本博士学位论文主要总结了对基酰胺衍生的膦配体的研究,以及该类型配体与Pd_2组成的催化剂在室温下催化氯代烃、溴代烃、溴代烯烃分别同基硼酸、烯基硼酸及烷基硼试剂进行的Suzuki偶联反应中的表现。

Examples of metal chelating groups include hydroxides especially aryl or heteroaryl hydroxides such as phenolic hydroxides; amines which may be aliphatic aryl or heteroaryl; mercaptans which may be aliphatic aryl or heteroaryl; carboxylic acids which may be aliphatic aryl or heteroaryl; oximes and ketoximines; acetarylamides; hydroxy silanes and silicones; N-containing heterocycles such as imidazoles benzimidazoles triazoles benzotriazoles thiazoles isothiazoles acid anhydrides and more preferably acid groups (especially carboxylic acid groups phosphoric acid groups polyphosphoric acid groups phosphonic acid groups sulphuric acid groups and sulphonic acid groups).

金属螯合组的例子包括氢氧化物,特别是基或如酚醛氢氧化物杂氢氧化物;胺可能是脂肪族,基或杂;硫醇可能是脂肪族,基或杂,这可能是脂肪族,基或羧酸杂;肟和ketoximines; acetarylamides;羟基硅烷和有机硅,含N,如咪唑,苯并咪唑类,三唑类,苯并三氮唑,噻唑类,isothiazoles,酸酐杂环,多最好酸组(特别是羧酸团体,磷酸,团体,多聚酸组,膦酸组,硫酸团体和磺酸组)。

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But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊!不用提了。提到肉,真是糟透了。

Tristan, I have nowhere to send this letter and no reason to believe you wish to receive it.

Tristan ,我不知道把这信寄到哪里,也不知道你是否想收到它。